Short answers, pulled from the story.
The Saturn rocket family consists of American heavy-lift launch vehicles developed from the late 1950s through the early 1970s. The program began in response to Department of Defense requirements released in late 1956 for a vehicle capable of placing between 9,000 and 18,000 kilograms into orbit.
Wernher von Braun directed the initial design studies at the Army Ballistic Missile Agency starting in April 1957. The Silverstein Committee later recommended hydrogen-burning upper stages while contracts went to Rocketdyne for engines and Douglas for the Saturn IV stage in 1960.
NASA selected the Saturn C-5 configuration later renamed Saturn V after President John F. Kennedy issued his challenge in May 1961 to land an astronaut on the Moon before decade's end. Officials chose this powerful booster design because it could meet mission mode selection requirements without needing entirely new factories like the Nova program.
The Saturn I completed ten total flights between October 1961 and July 1965 while the Saturn IB achieved nine successful launches from February 1966 through July 1975. Thirteen Saturn V launches occurred sending Apollo astronauts to the Moon with no catastrophic failures during actual flight operations outside pad testing scenarios.
A fire ignited in the crew module during ground testing of the Apollo 1 test flight which burned alive all three astronauts aboard. This tragedy occurred on the launch pad before any orbital mission commenced and forced a complete reevaluation of safety protocols throughout the entire Apollo program infrastructure.